Can you find out the missing number in the grid?

When we see 2 but call 10?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A journalist was investigating a sacred cult in the jungles of Africa when he was caught by one of the person. He was confined in a cave till the leader arrived. The leader told him that he need to tell him a statement. If he thinks the statement is true, then the journalist head will be chopped off. If he thinks that the statement is false, his head will be smashed with a hammer.

What statement did the journalist make to survive?

A man embarked on a questionnaire game. He kept asking the same question to whomever he found. The answer each time was different.

Can you guess what the question was?

What does this rebus means ?

PROG WORKRESS

What's the only room from which no one can enter or leave

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?